Muscles of the arm and cubital fossa Flashcards

1
Q

Describe the origin, insertion and nerve innervation of the coracobrachialis;

A
'O' = Coracoid process
'I' = Medial side of humerus opposite deltoid tuberosity

nerve = Musculocutaneous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Describe the origin, insertion and nerve innervation of the brachialis;

A

‘O’ = Anterior surface of the distal humerus (including intermuscular septa)

‘I’ = Tuberosity of ulna

Nerve = musculocutaneous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What nerves innervate the posterior compartment?

A

Radial nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Describe the origin, insertion and nerve innervation of the biceps brachii;

A

Origin;
Long head; Supraglenoid tubercle
Short head; Coracoid process

Insertion; radial tuberosity and biceptial aponeurosis

Nerve = Musculocutaneous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Describe the movement of the different deltoid fibres;

A

Anterior fibres:

  • Flex shoulder
  • Internally rotates arm
  • Abduct/adducts the arm (depends on position)

Posterior fibres:

  • Extend shoulder
  • Externally rotates arm
  • Abduct/adducts arm (depends on position)

Middle fibres
- Abducts arm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Describe the deltoid fibres;

A
Anterior fibres (Unipennate)
Posterior fibres (unipennate)
Middle fibres (Multipennate) 
Unipennate = Strong
Multipennate = Very strong
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Describe the borders of the cubtal fossa;

A

Superior border is formed by the ‘line’ between the lateral and medial epicondyles

Medial border; Pronator teres

Lateral boundary; Brachioradialis.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe teres major origin, insertion and nerve innervation;

A
'O' = Inferior angle and lateral border of scapula
'I' = Medial lip of intertubercular groove

Nerve = Lower subscapular

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What muscles are found in the posterior compartment?

A

Triceps brachii

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the origin and insertion of the deltoid;

A
'O' = Anatomical horseshoe
'I' = Deltoid tuberosity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe the compartments of the brachium;

A

Posterior and anterior compartments at the mid level of the humerus.

At the distal end of the humerus there is also Ext./Sup. compartment on the lateral side and Flex./Pro. compartment of the medial side.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What nerve innervates the anterior compartment?

A

Musculocutaneous nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What muscles are found in the anterior compartment of the arm?

A

Biceps brachii
Coracobrachialis
Brachialis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Describe the origin, insertion and nerve innervation of the triceps brachii;

A

‘O’

  • Long head = Infraglenoid tubercle
  • Medial head = medial aspect of humerus
  • Lateral head = Lateral aspect of humerus

‘I’ = Olecranon (Ulna)

Nerve = Radial nerve.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly